Because the parasites in marine fish are mainly nematodes, they can hardly survive in human body. The parasites in freshwater fish are mainly liver flukes and paragonimiasis, and their osmotic pressure is consistent with that of human body, so they can easily survive and grow in human body. Therefore, the parasitic risk of rainbow trout cultured in fresh water will be higher than that of regular salmon. So how to eat fish safely?
Cooked and cooked, parasites can be eliminated at a high temperature above 60 degrees Celsius. How to distinguish seawater salmon from freshwater rainbow trout? In general, seawater salmon and freshwater rainbow trout can be distinguished by their appearance. In appearance, Atlantic salmon has a flat body, a bulging back, sharp teeth, small scales, silver gray, orange stripes during spawning, and it seems to have a sparkling luster, which will be faintly reflected under the light. The surface of rainbow trout is dark, and the sexual mature individuals has a wide and bright red rainbow band in purple and pink along the lateral line. The fish body is spindle-shaped, slightly flat on the side, with a large mouth and oblique crack.
The color of rainbow trout meat is relatively light, but some merchants add carotene to make it darker during the breeding period in order to pretend to be a serious salmon, which is generally the same as that of a serious salmon, and it is difficult to see the difference with the naked eye. So I suggest that if you want to buy sea salmon, try to buy whole salmon, which is easy to distinguish and try not to eat it raw!